This compund is used to remove calcareous encrustations which most commonly occur on copper-alloy coins and artefacts. WARNING prolongued exposure to this compound will remove patina. Do not ingest,

Dispose of spent solutions in a suitable place

Used substances must never be poured down the sink or drain as this is a major source of pollution. Used substances should be placed in a sealed container and taken to a civic amenity point for correct disposal. Label all containers to avoid confusion.